Question

*50 Points*
(x2+2xy-3y2) - (2x2-4xy-5y2) =

Answer 1

Answer:

$({x}^{2} + 2xy - 3 {y}^{2} ) - (2 {x}^{2} - 4xy - 5 {y}^{2} ) \\ {x }^{2} + 2xy - 3 {y}^{2} - 2 {x}^{2} + 4xy + 5 {y}^{2} \\ {x}^{2} - 2 {x}^{2} + 2xy + 4xy - 3 {y}^{2} + 5y {}^{2} \\ - {x}^{2} + 6xy + 2 {y}^{2}$

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Answer 2

Answer:

=x^2 + 2xy - 3y^2 -2x^2 -4xy -5y^2

= -x^2+2xy18y^2

= -(x^2-2xy-8y^2)

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